I wrote a SOP that two grad students at elite phd programs said was exceptional. My letter writer read it and thought it was complete trash conceptually and wanted me to rewrite it completely. He was at a loss for words for how bad it was, and had almost no feedback to offer because it didnt fit his prototype of what a SOP should be. He nonetheless wrote a strong letter about how great I was as an employee/researcher.
Still got invited to interview at great programs, and other faculty members thought I wrote extremely well -- that my SOP 'cLeArLy sToOd oUt' and that my prose 'JuMpeD aT thEm'
My point is that not all people will agree with whether a SOP is good. It can still be good. Just in a different way.